A complete system solution for off-grid inverters using modular components consists of a number of manageable building blocks: inverter/charger, solar charge controller, automatic generator starter module, and system control board. The off-grid inverter is an electronic device that converts the 12V/24V/48V/60V/72V DC power provided by the battery into 220V AC, and at the same time converts the mains power into DC power to charge the battery. At the same time, it is used in the solar power generation system. The inverter is also an important part of the solar power generation system. Off-grid inverters can be used in remote areas without power network coverage, such as deserts, plateaus, and deep forests, providing power demand anytime, anywhere.
How Off-Grid Inverters Work?
The photovoltaic off-grid inverter is a power conversion device, which push-pull boosts the input DC power, and then inverts the DC power into 220V AC power through the inverter bridge SPWM sinusoidal pulse width modulation technology.
The scope of use of off-grid inverters
- Areas where the voltage is unstable at ordinary times, or where the power is often cut off.
- Some friends need electricity (battery is connected to the inverter) for business, especially barbecue, small fruit stalls, night supper stalls and other types.
- In remote mountainous areas where mains electricity is difficult to reach.
- When going out camping, you need a lighted place.
- The place to charge the laptop and mobile phone in the car.
How to use grid-connected inverter off-grid?
The grid-connected inverter can be directly used as an off-grid inverter.
The grid-connected inverter sends energy directly to the grid, so it is necessary to track the frequency and phase of the grid, which is equivalent to a current source. Of course, some inverters are said to have low-voltage ride-through capability and can do PQ adjustment.
The off-grid inverter is equivalent to establishing an independent small power grid by itself, mainly to control its own voltage, which is a voltage source.
Grid-connected inverters do not require energy storage, but the energy cannot be controlled. As much photovoltaic power is generated, it can be sent to the Internet.
Off-grid generally requires energy storage and does not send energy to the grid. The grid has no right to interfere.
Advantages of off grid inverter
A grid-tied inverter delivers energy directly to the grid, so tracking the frequency and phase of the grid acts as a current source. The off-grid inverter is equivalent to building an independent small grid, mainly to control its own voltage source. Grid-connected inverters do not require energy storage, but cannot be regulated. Off-grid inverter systems generally require energy storage and do not transmit to the grid, and the grid has no right to intervene.
Off-grid inverters are used in photovoltaic off-grid power generation systems, which mainly convert DC power into AC power for AC loads. The photovoltaic off-grid inverter itself does not have an energy storage function, and usually requires a battery to be used normally. However, the battery is expensive and has a short lifespan, which makes the cost of the entire photovoltaic off-grid power generation system too high.
The off-grid inverter can work independently after leaving the grid, which is equivalent to an independent small grid and mainly controls its own voltage source. It can carry loads such as resistance, capacitance, motor inductance, fast strain and anti-interference, strong adaptability and strong practicability. It is the first choice for power outage emergency power supply and outdoor power supply.
Photovoltaic off-grid inverters are suitable for power systems, communication systems, railway systems, ships, hospitals, shopping malls, schools, outdoor and other places. Can be connected to the mains to charge the battery. Can be set to battery priority or utility priority. Generally, off-grid inverters need to be connected to batteries, because photovoltaic power generation is unstable and the load is unstable. Batteries are needed to balance the energy.
We stock two versions of off grid solar power inverters to compelet your PV project. One version is a multi-function inverter / charger from 700 watt to 6000 watt, 12V/ 24V/ 48V DC input to 120V/ 220V/ 230V AC output, combining functions of inverter, and battery charger to offer uninterruptible power support with portable size. Another version is three phase pure sine wave inverter with high power from 8kW to 200kW, no battery storage design, smart LCD display setting, powerful protection functions.